A forensic specialist testified here Wednesday she had made a mistake when analyzing blood found in the house where Hans Reiser's wife was last seen.

The fragments of blood, the scientist testified Tuesday, contained DNA from the Linux guru and his wife, Nina Reiser. The authorities discovered it on a pillar in an entryway in the Oakland hills house two weeks after the 31-year-old woman went missing Sept. 3, 2006.

But on Wednesday, the scientist testified on cross examination that errors she made meant it was unclear whether there was two sources of blood -- meaning it could be the wife's or the husband's -- or blood from both of them. She testified she was not "100 percent certain" whose blood was on the pillar.

It's an important distinction.

Rest Here

Also: Hans Reiser Trial: Jan. 23, 2008